Brand: Seiko Model: Chronograph Automatic Reference Number: 6139-6012 Movement: Automatic – Seiko Calibre 6139 (17 jewels) Case Material: Stainless steel Case Diameter: Approx. 40 mm (excluding crown) Case Shape: Round Caseback: Stainless steel, screw-back, signed Seiko Dial: Original blue dial with applied luminous hour markers, red chronograph seconds hand, day & date window at 3 o’clock Functions: Hours, minutes, chronograph seconds, day, date Bezel: Inner tachymeter scale Crystal: Hardlex crystal Crown: Seiko signed crown Strap: Blue leather strap – approx. 19 cm (excluding case) Year of Manufacture: Circa 1970s Condition: Very good vintage condition – original dial with attractive blue tone, case shows light signs of wear consistent with age, movement tested and working Extras: No box or papers Gender: Men’s Description A highly attractive vintage Seiko Chronograph Automatic Ref. 6139-6012, powered by the legendary Seiko Calibre 6139, one of the world’s first automatic chronograph movements. This model features a beautiful original blue dial with strong presence and excellent legibility, complemented by the inner tachymeter scale and classic 1970s design. The stainless steel case retains its solid proportions, making it a highly wearable and collectible vintage chronograph. The Calibre 6139 is well known for its robustness and historical importance, making this watch a desirable piece for collectors of vintage Seiko chronographs. A strong example of 1970s Seiko design, combining mechanical innovation with timeless sport elegance. Service & Shipping All watches are carefully inspected and tested before listing. The movement is running and functioning properly at the time of listing. Fast and secure worldwide shipping via DHL / UPS / FedEx with tracking and careful packaging. Please note: Any customs duties, import taxes, or additional fees are the buyer’s responsibility.